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干式报警装置的工作原理是什么

干式报警装置的工作原理是什么

浏览：46次 | 提问时间： 07-06 08:16

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我不配 07-06 08:17

你好，干式报警阀的工作原理是：它平时阀瓣前后水压相等(水通过导向管中的水压平衡小孔，保持阀瓣前后水压平衡)。干式报警阀则由阀前水压和阀后管中的有压气体的压强引起的，发生火灾时，闭式喷头喷水，由于水压平衡小孔来不及补水，报警阀上面水压下降，此时阀瓣前水压大于阀瓣后水压，于是阀瓣开启，向立管及管网供水，同时水沿着报警阀的环形槽进入延时器、压力开关及水力警铃等设施，发出火警信号并启动消防泵。
希望我的回答能帮到你。

我是祖国的食人花 07-06 08:25

工作原理：启动前，干式报警阀前(与水源相连一侧)的管道内充以压力水，干式报警阀后的管道内充以压缩空气，报警阀处于关闭状态。发生火灾时，闭式喷头热敏感元件动作，喷头开启，管道中的压缩空气从喷头喷出，使干式阀出口侧压力下降，造成报警阀前部水压力大于后部气压力。
　　干式报警阀被自动打开，压力水进入供水管道，将剩余的压缩空气从已打开的喷头处推出，然后喷水灭火。在干式报警阀被打开的同时，通向水力警铃和压力开关的通道也被打开，水流冲击水力警铃和压力开关，并启动水泵加压供水。
希望我的回答对你有帮助。

你走多远了 07-06 08:33

工作原理
与湿式报警阀基本相同，不同之处在于湿式报警阀阀板上面的总压力为管网中的有压水的压强引起，而干式报警阀则由阀前水压和阀后管中的有压气体的压强引起。它是在其出口侧充以压缩气体，当气压低于某一定值时能使水自动流入喷水系统并进行报警的单向阀。

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